SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    10489, 10471, 9880, 10472, 9885, 10488, 
    9897, 9895, 10467, 9900, 10470, 10466, 
    10477, 9889, 10475, 9890, 10483, 10495, 
    10490, 10469
  )

Query time 0.00083

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "cscart_products",
      "access_type": "range",
      "possible_keys": ["PRIMARY"],
      "key": "PRIMARY",
      "key_length": "3",
      "used_key_parts": ["product_id"],
      "rows": 20,
      "filtered": 100,
      "index_condition": "cscart_products.product_id in (10489,10471,9880,10472,9885,10488,9897,9895,10467,9900,10470,10466,10477,9889,10475,9890,10483,10495,10490,10469)"
    }
  }
}