SELECT 
  product_id 
FROM 
  cscart_product_popularity 
WHERE 
  product_id IN (
    12525, 12526, 12528, 12527, 12530, 12529, 
    12531, 12532, 12533, 12534, 12535
  )

Query time 0.00072

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "2.51"
    },
    "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": 11,
      "rows_produced_per_join": 11,
      "filtered": "100.00",
      "using_index": true,
      "cost_info": {
        "read_cost": "1.41",
        "eval_cost": "1.10",
        "prefix_cost": "2.51",
        "data_read_per_join": "352"
      },
      "used_columns": [
        "product_id"
      ],
      "attached_condition": "(`test2_gaseus`.`cscart_product_popularity`.`product_id` in (12525,12526,12528,12527,12530,12529,12531,12532,12533,12534,12535))"
    }
  }
}