The order time depends only on the selected price. The higher your price from the current market price, the longer your order will not be filled.
If you put sell or buy order by market price, transaction will be processed within few seconds.
So, you need to wait until your order will be filled or you can cancel and create a new one.
In order to cancel opened order just click on the X Cancel in the My Open Orders box.
Note: Please take into account the maximum order time is 30 days. You can change the order time in the Expiration field.