SELECT 
  `L`.`location_id`, 
  `LD`.`tilda_link` 
FROM 
  cscart_bm_locations AS L 
  LEFT JOIN cscart_bm_locations_descriptions AS LD ON L.location_id = LD.location_id 
WHERE 
  `L`.`object_ids` LIKE '%712%' 
  AND `LD`.`is_tilda_page` = 'Y'

Query time 0.00054

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "39.49"
    },
    "nested_loop": [
      {
        "table": {
          "table_name": "LD",
          "access_type": "ALL",
          "possible_keys": [
            "PRIMARY"
          ],
          "rows_examined_per_scan": 287,
          "rows_produced_per_join": 28,
          "filtered": "10.00",
          "cost_info": {
            "read_cost": "26.58",
            "eval_cost": "2.87",
            "prefix_cost": "29.45",
            "data_read_per_join": "28K"
          },
          "used_columns": [
            "location_id",
            "is_tilda_page",
            "tilda_link"
          ],
          "attached_condition": "((`dev2`.`LD`.`is_tilda_page` = 'Y') and (`dev2`.`LD`.`location_id` is not null))"
        }
      },
      {
        "table": {
          "table_name": "L",
          "access_type": "eq_ref",
          "possible_keys": [
            "PRIMARY"
          ],
          "key": "PRIMARY",
          "used_key_parts": [
            "location_id"
          ],
          "key_length": "3",
          "ref": [
            "dev2.LD.location_id"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 3,
          "filtered": "11.11",
          "cost_info": {
            "read_cost": "7.18",
            "eval_cost": "0.32",
            "prefix_cost": "39.50",
            "data_read_per_join": "739"
          },
          "used_columns": [
            "location_id",
            "object_ids"
          ],
          "attached_condition": "((`dev2`.`L`.`object_ids` like '%712%') and (`dev2`.`L`.`location_id` = `dev2`.`LD`.`location_id`))"
        }
      }
    ]
  }
}