SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    5257, 37849, 5288, 41437, 4795, 37881, 
    37300, 37296, 6371, 5770, 27056, 37294, 
    26849, 47652, 41358, 40754, 26856, 
    37302, 37284, 26851, 41368, 3464, 32360, 
    41387, 26857, 6103, 41367, 5635, 31645, 
    18194, 41423, 37942
  )

Query time 0.00223

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 (5257,37849,5288,41437,4795,37881,37300,37296,6371,5770,27056,37294,26849,47652,41358,40754,26856,37302,37284,26851,41368,3464,32360,41387,26857,6103,41367,5635,31645,18194,41423,37942)"
        }
      }
    ]
  }
}