SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    3568, 3567, 3517, 3516, 3518, 3570, 3569, 
    37850, 3577, 3519, 3578, 37315, 3579, 
    3580, 37314, 3587, 3586, 3585, 3471, 
    3535, 19285, 3472, 1781, 37847, 19279, 
    1784, 19270, 3528, 19289, 41594
  )

Query time 0.00194

JSON explain

{
  "query_block": {
    "select_id": 1,
    "nested_loop": [
      {
        "table": {
          "table_name": "cscart_products",
          "access_type": "range",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "3",
          "used_key_parts": ["product_id"],
          "rows": 30,
          "filtered": 100,
          "index_condition": "cscart_products.product_id in (3568,3567,3517,3516,3518,3570,3569,37850,3577,3519,3578,37315,3579,3580,37314,3587,3586,3585,3471,3535,19285,3472,1781,37847,19279,1784,19270,3528,19289,41594)"
        }
      }
    ]
  }
}