SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    402092, 403976, 408452, 428407, 451396, 
    417863, 404877, 460518, 418662, 425706, 
    403670, 447102
  )

Query time 0.00055

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost": 0.0216566,
    "nested_loop": [
      {
        "table": {
          "table_name": "cscart_products",
          "access_type": "range",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "3",
          "used_key_parts": ["product_id"],
          "loops": 1,
          "rows": 12,
          "cost": 0.0216566,
          "filtered": 100,
          "attached_condition": "cscart_products.product_id in (402092,403976,408452,428407,451396,417863,404877,460518,418662,425706,403670,447102)"
        }
      }
    ]
  }
}