SELECT 
  cscart_bm_snapping.grid_id as grid_id, 
  cscart_bm_snapping.block_id as block_id, 
  IFNULL(
    dynamic_object_content.content, 
    default_content.content
  ) as content, 
  IFNULL(
    dynamic_object_content.object_id, 
    default_content.object_id
  ) AS object_id, 
  IFNULL(
    dynamic_object_content.object_type, 
    default_content.object_type
  ) AS object_type, 
  cscart_bm_block_statuses.object_ids as object_ids, 
  cscart_bm_snapping.*, 
  cscart_bm_blocks.*, 
  cscart_bm_blocks_descriptions.* 
FROM 
  cscart_bm_snapping 
  LEFT JOIN cscart_bm_blocks ON cscart_bm_blocks.block_id = cscart_bm_snapping.block_id 
  LEFT JOIN cscart_bm_block_statuses ON cscart_bm_snapping.snapping_id = cscart_bm_block_statuses.snapping_id 
  AND cscart_bm_block_statuses.object_type LIKE '' 
  LEFT JOIN cscart_bm_blocks_descriptions ON cscart_bm_blocks.block_id = cscart_bm_blocks_descriptions.block_id 
  LEFT JOIN cscart_bm_blocks_content AS default_content ON cscart_bm_blocks.block_id = default_content.block_id 
  AND cscart_bm_blocks_descriptions.lang_code = default_content.lang_code 
  AND default_content.snapping_id = 0 
  AND default_content.object_id = 0 
  AND default_content.object_type like '' 
  LEFT JOIN cscart_bm_blocks_content AS dynamic_object_content ON cscart_bm_blocks.block_id = dynamic_object_content.block_id 
  AND cscart_bm_blocks_descriptions.lang_code = dynamic_object_content.lang_code 
  AND dynamic_object_content.object_id = 0 
  AND dynamic_object_content.object_type like '' 
WHERE 
  cscart_bm_snapping.grid_id IN (
    94, 95, 96, 105, 108, 113, 106, 107, 109, 
    114, 115, 192, 110, 193, 111, 195, 112, 
    196, 191, 158, 159, 160, 161, 162, 287, 
    288, 289, 163, 164, 224, 221, 222, 223
  ) 
  AND cscart_bm_blocks_descriptions.lang_code = 'en' 
ORDER BY 
  cscart_bm_snapping.order, 
  cscart_bm_snapping.block_id

Query time 0.00131

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost": 0.371602708,
    "nested_loop": [
      {
        "read_sorted_file": {
          "filesort": {
            "sort_key": "cscart_bm_snapping.`order`, cscart_bm_snapping.block_id",
            "table": {
              "table_name": "cscart_bm_snapping",
              "access_type": "ALL",
              "possible_keys": ["grid_id"],
              "loops": 1,
              "rows": 358,
              "cost": 0.0709184,
              "filtered": 13.1284914,
              "attached_condition": "cscart_bm_snapping.grid_id in (94,95,96,105,108,113,106,107,109,114,115,192,110,193,111,195,112,196,191,158,159,160,161,162,287,288,289,163,164,224,221,222,223)"
            }
          }
        }
      },
      {
        "table": {
          "table_name": "cscart_bm_blocks",
          "access_type": "eq_ref",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "4",
          "used_key_parts": ["block_id"],
          "ref": ["u985510652_ecartify_dev.cscart_bm_snapping.block_id"],
          "loops": 47,
          "rows": 1,
          "cost": 0.04449628,
          "filtered": 100
        }
      },
      {
        "table": {
          "table_name": "cscart_bm_blocks_descriptions",
          "access_type": "eq_ref",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "10",
          "used_key_parts": ["block_id", "lang_code"],
          "ref": ["u985510652_ecartify_dev.cscart_bm_snapping.block_id", "const"],
          "loops": 47,
          "rows": 1,
          "cost": 0.04285788,
          "filtered": 100,
          "attached_condition": "cscart_bm_blocks_descriptions.lang_code = 'en'"
        }
      },
      {
        "table": {
          "table_name": "cscart_bm_block_statuses",
          "access_type": "ref",
          "possible_keys": ["snapping_id"],
          "key": "snapping_id",
          "key_length": "4",
          "used_key_parts": ["snapping_id"],
          "ref": ["u985510652_ecartify_dev.cscart_bm_snapping.snapping_id"],
          "loops": 47,
          "rows": 1,
          "cost": 0.04615399,
          "filtered": 100,
          "attached_condition": "trigcond(cscart_bm_snapping.snapping_id = cscart_bm_block_statuses.snapping_id and cscart_bm_block_statuses.object_type like '')"
        }
      },
      {
        "table": {
          "table_name": "default_content",
          "access_type": "ref",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "18",
          "used_key_parts": ["block_id", "snapping_id", "lang_code", "object_id"],
          "ref": [
            "u985510652_ecartify_dev.cscart_bm_snapping.block_id",
            "const",
            "u985510652_ecartify_dev.cscart_bm_blocks_descriptions.lang_code",
            "const"
          ],
          "loops": 47,
          "rows": 1,
          "cost": 0.04943079,
          "filtered": 100,
          "attached_condition": "trigcond(default_content.object_type like '')"
        }
      },
      {
        "table": {
          "table_name": "dynamic_object_content",
          "access_type": "ref",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "4",
          "used_key_parts": ["block_id"],
          "ref": ["u985510652_ecartify_dev.cscart_bm_snapping.block_id"],
          "loops": 47,
          "rows": 2,
          "cost": 0.05709179,
          "filtered": 100,
          "attached_condition": "trigcond(dynamic_object_content.lang_code = cscart_bm_blocks_descriptions.lang_code and dynamic_object_content.object_id = 0 and dynamic_object_content.object_type like '')"
        }
      }
    ]
  }
}