The short and conservative answer is up to one (1) hour the first time and then in less than twenty (20) minutes each time.
Most orders are processed in just a few minutes. ETH and ERC-20 tokens are processed within 5-10 minutes after a successful charge from the bank card.
BTC takes sometimes longer to be executed due to the protocol of the first crypto currency.
The purchased digital asset will be deposited into your GokuMarket wallet and as usual, it will need some blockchain confirmations before the funds are available for use. Please view the cryptocurrency deposit status in your wallet.
[Latest update 2020-10-27]