SELECT 
  product_id 
FROM 
  cscart_product_popularity 
WHERE 
  product_id IN (
    279387, 279389, 279390, 279391, 279392, 
    279393, 279394, 279395, 279397, 279398, 
    279399, 279400, 279401, 279402, 279403, 
    279404, 279405, 279406, 279407
  )

Query time 0.00073

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "8.63"
    },
    "table": {
      "table_name": "cscart_product_popularity",
      "access_type": "range",
      "possible_keys": [
        "PRIMARY",
        "total"
      ],
      "key": "total",
      "used_key_parts": [
        "product_id"
      ],
      "key_length": "3",
      "rows_examined_per_scan": 19,
      "rows_produced_per_join": 19,
      "filtered": "100.00",
      "using_index": true,
      "cost_info": {
        "read_cost": "4.83",
        "eval_cost": "3.80",
        "prefix_cost": "8.63",
        "data_read_per_join": "608"
      },
      "used_columns": [
        "product_id"
      ],
      "attached_condition": "(`webmarco`.`cscart_product_popularity`.`product_id` in (279387,279389,279390,279391,279392,279393,279394,279395,279397,279398,279399,279400,279401,279402,279403,279404,279405,279406,279407))"
    }
  }
}