SELECT 
  auth_image_id 
FROM 
  cscart_uchur_auth_images 
WHERE 
  object_id = 1 
  AND lang_code = 'ru'

Query time 0.00048

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "0.45"
    },
    "table": {
      "table_name": "cscart_uchur_auth_images",
      "access_type": "ALL",
      "rows_examined_per_scan": 2,
      "rows_produced_per_join": 1,
      "filtered": "50.00",
      "cost_info": {
        "read_cost": "0.35",
        "eval_cost": "0.10",
        "prefix_cost": "0.45",
        "data_read_per_join": "16"
      },
      "used_columns": [
        "auth_image_id",
        "object_id",
        "lang_code"
      ],
      "attached_condition": "((`test_uchur_k`.`cscart_uchur_auth_images`.`object_id` = 1) and (`test_uchur_k`.`cscart_uchur_auth_images`.`lang_code` = 'ru'))"
    }
  }
}