SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    10655, 9724, 9735, 9734, 10181, 9733, 
    9732, 9731, 9730, 9728, 9729, 9727, 
    10601, 10642, 9945, 10651, 10226, 10227, 
    10200, 10201
  )

Query time 0.01445

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 (10655,9724,9735,9734,10181,9733,9732,9731,9730,9728,9729,9727,10601,10642,9945,10651,10226,10227,10200,10201)"
    }
  }
}