SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    4434, 4681, 4432, 4438, 4433, 4435, 4437, 
    4436, 4441, 4430, 4440, 4450, 4439, 
    4442, 4429, 4431, 4916
  )

Query time 0.00034

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": 17,
      "filtered": 100,
      "index_condition": "cscart_products.product_id in (4434,4681,4432,4438,4433,4435,4437,4436,4441,4430,4440,4450,4439,4442,4429,4431,4916)"
    }
  }
}