Just make sure any ointment doesn't have painkillers in it.
I agree, put the ointment on now. Just check on it every day to see how well it's healing. If there is any sign of infection, take the snake to a vet right away before it gets too serious.
After while it will scab over, and after a few sheds it should be fine barring any infection.
I hope this experience has helped you realize that feeding live is not in the best interest for the snake.
Besides, feeding frozen/thawed is much more convenient. Freshly killed is good too.