Thank you for the fast reply!
Unfortunately, this doesn't seem to work for me. The setting is turned on, and I'm holding the command key. I press c the first time, and by the time I press it again, no matter how quickly I press it, the Alfred window autohides and the system error tone plays since I've pressed ⌘C without selecting anything in whatever app I'm running. The selected item is copied to the clipboard, as expected.