SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    41594, 2460, 43670, 20588, 3437, 2018, 
    2443, 2497, 5416, 5418, 2911, 3196, 
    1661, 3223, 4074, 14985, 1056, 2466, 
    5402, 3747, 2465, 1875, 1098, 3990, 
    4192, 33703, 2081, 4883, 37282, 2016, 
    2575, 2469
  )

Query time 0.00184

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": 32,
          "filtered": 100,
          "index_condition": "cscart_products.product_id in (41594,2460,43670,20588,3437,2018,2443,2497,5416,5418,2911,3196,1661,3223,4074,14985,1056,2466,5402,3747,2465,1875,1098,3990,4192,33703,2081,4883,37282,2016,2575,2469)"
        }
      }
    ]
  }
}