Seems on the early side to me. Me, I’d wait until it hit 60K if that’s what the owner’s manual says. But before you think I know what I’m talking about, consider that on my early 90’s Corolla, the owner’s manual said 60k and I changed it at 100K, and that was when the belt (and the car) was10 years old. The existing belt that I changed out still had a lot of wear left in it, at least 25K more I’d guess. But that’s me, w/ a Corolla, driven gently, in a mild climate. Your car and situation are different. It’s best to follow the owner’s manual. Do what it says. If the timing belt breaks it can produce a very expensive repair bill.