SELECT 
  `feature_id` 
FROM 
  cscart_product_features_descriptions 
WHERE 
  `link` = '?feature=moschnosty-dvigatelya-ls&features'

Query time 0.00055

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "18.35"
    },
    "table": {
      "table_name": "cscart_product_features_descriptions",
      "access_type": "ALL",
      "rows_examined_per_scan": 176,
      "rows_produced_per_join": 17,
      "filtered": "10.00",
      "cost_info": {
        "read_cost": "16.59",
        "eval_cost": "1.76",
        "prefix_cost": "18.35",
        "data_read_per_join": "48K"
      },
      "used_columns": [
        "feature_id",
        "link"
      ],
      "attached_condition": "(`dev2`.`cscart_product_features_descriptions`.`link` = '?feature=moschnosty-dvigatelya-ls&features')"
    }
  }
}