SELECT 
  product_id 
FROM 
  cscart_product_popularity 
WHERE 
  product_id IN (
    11121, 11130, 11131, 11132, 11126, 11127, 
    11128, 11129, 11122, 11123, 11124, 
    11125, 11120, 11119, 11118, 11117, 
    11116, 11115, 11114, 11113, 11112
  )

Query time 0.00087

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "4.56"
    },
    "table": {
      "table_name": "cscart_product_popularity",
      "access_type": "range",
      "possible_keys": [
        "PRIMARY",
        "total"
      ],
      "key": "PRIMARY",
      "used_key_parts": [
        "product_id"
      ],
      "key_length": "3",
      "rows_examined_per_scan": 21,
      "rows_produced_per_join": 21,
      "filtered": "100.00",
      "using_index": true,
      "cost_info": {
        "read_cost": "2.46",
        "eval_cost": "2.10",
        "prefix_cost": "4.56",
        "data_read_per_join": "672"
      },
      "used_columns": [
        "product_id"
      ],
      "attached_condition": "(`gaseus`.`cscart_product_popularity`.`product_id` in (11121,11130,11131,11132,11126,11127,11128,11129,11122,11123,11124,11125,11120,11119,11118,11117,11116,11115,11114,11113,11112))"
    }
  }
}