SELECT 
  cscart_ab__gp_locations.*, 
  cscart_ab__gp_location_descriptions.seo_name 
FROM 
  cscart_ab__gp_locations 
  LEFT JOIN cscart_ab__gp_location_descriptions ON cscart_ab__gp_locations.location_id = cscart_ab__gp_location_descriptions.location_id 
WHERE 
  1 
  AND cscart_ab__gp_locations.company_id = 1 
  AND cscart_ab__gp_location_descriptions.seo_name = 'shkafy-i-shchitovoe-oborudovanie' 
  AND cscart_ab__gp_locations.status = 'A'

Query time 0.00007

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "2.40"
    },
    "nested_loop": [
      {
        "table": {
          "table_name": "cscart_ab__gp_locations",
          "access_type": "ALL",
          "possible_keys": [
            "PRIMARY"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 1,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "1.00",
            "eval_cost": "0.20",
            "prefix_cost": "1.20",
            "data_read_per_join": "328"
          },
          "used_columns": [
            "location_id",
            "company_id",
            "status",
            "seo_name",
            "link_type"
          ],
          "attached_condition": "((`44mm_ru`.`cscart_ab__gp_locations`.`company_id` = 1) and (`44mm_ru`.`cscart_ab__gp_locations`.`status` = 'A'))"
        }
      },
      {
        "table": {
          "table_name": "cscart_ab__gp_location_descriptions",
          "access_type": "ref",
          "possible_keys": [
            "PRIMARY",
            "seo_name"
          ],
          "key": "PRIMARY",
          "used_key_parts": [
            "location_id"
          ],
          "key_length": "4",
          "ref": [
            "44mm_ru.cscart_ab__gp_locations.location_id"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 1,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "1.00",
            "eval_cost": "0.20",
            "prefix_cost": "2.40",
            "data_read_per_join": "2K"
          },
          "used_columns": [
            "location_id",
            "seo_name"
          ],
          "attached_condition": "((`44mm_ru`.`cscart_ab__gp_location_descriptions`.`seo_name` = 'shkafy-i-shchitovoe-oborudovanie') and (`44mm_ru`.`cscart_ab__gp_locations`.`location_id` = `44mm_ru`.`cscart_ab__gp_location_descriptions`.`location_id`))"
        }
      }
    ]
  }
}