SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    65688, 65103, 65694, 65102, 65696, 65702, 
    65716, 65717, 65697, 65695, 65690, 
    65689
  )

Query time 0.00051

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": 12,
      "filtered": 100,
      "attached_condition": "cscart_products.product_id in (65688,65103,65694,65102,65696,65702,65716,65717,65697,65695,65690,65689)"
    }
  }
}

Result