It happens, no worries! It takes a snake days and weeks of sitting on wet substrate to get scale rot.
You can still go for the Sunday feeding, a couple minutes handling early would hardly affect it.Though Wednesday is also fine if you're worried.
When they spill a water bowl or something, I just change new substrate and dry out the tub and put the snake back even if it's a bit wet. They'll dry off naturally in the dry substrate.