SELECT 
  `link`, 
  `company_id` 
FROM 
  `price_list` 
WHERE 
  `link` = 'dayun-cgc1120d-4x2-refrizherator-vnutr.-razmery-nadstroyki-6500h2450h2100-mm-hou-terrafrigo-18s-20s-gidrobort-1-5-tn'

Query time 0.00024

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "1.65"
    },
    "table": {
      "table_name": "price_list",
      "access_type": "ALL",
      "rows_examined_per_scan": 14,
      "rows_produced_per_join": 1,
      "filtered": "10.00",
      "cost_info": {
        "read_cost": "1.51",
        "eval_cost": "0.14",
        "prefix_cost": "1.65",
        "data_read_per_join": "2K"
      },
      "used_columns": [
        "company_id",
        "link"
      ],
      "attached_condition": "(`dev2`.`price_list`.`link` = 'dayun-cgc1120d-4x2-refrizherator-vnutr.-razmery-nadstroyki-6500h2450h2100-mm-hou-terrafrigo-18s-20s-gidrobort-1-5-tn')"
    }
  }
}