SELECT 
  product_id 
FROM 
  cscart_product_popularity 
WHERE 
  product_id IN (
    10972, 10973, 10974, 10975, 10976, 10977, 
    10978, 10979, 10980, 10981, 10982, 
    10983, 10984, 10966, 10967, 10968, 
    10969, 10970, 10971
  )

Query time 0.00082

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "4.15"
    },
    "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": 19,
      "rows_produced_per_join": 19,
      "filtered": "100.00",
      "using_index": true,
      "cost_info": {
        "read_cost": "2.25",
        "eval_cost": "1.90",
        "prefix_cost": "4.15",
        "data_read_per_join": "608"
      },
      "used_columns": [
        "product_id"
      ],
      "attached_condition": "(`gaseus`.`cscart_product_popularity`.`product_id` in (10972,10973,10974,10975,10976,10977,10978,10979,10980,10981,10982,10983,10984,10966,10967,10968,10969,10970,10971))"
    }
  }
}