SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    16346, 16334, 16348, 15749, 14660, 14149, 
    16347, 14128, 14140, 14656, 14654, 
    14661, 15751, 16338, 15753, 14136, 
    16340, 15747, 16351, 15750, 14652, 
    14145, 14658, 14147
  )

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost": 0.04252208,
    "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": 24,
          "cost": 0.04252208,
          "filtered": 100,
          "attached_condition": "cscart_products.product_id in (16346,16334,16348,15749,14660,14149,16347,14128,14140,14656,14654,14661,15751,16338,15753,14136,16340,15747,16351,15750,14652,14145,14658,14147)"
        }
      }
    ]
  }
}