My car hits 100K mileage. What should I do?

The 2010 Camry SE has driven to 100K miles in 3 years. I am not sure how the previous owner got the car at 90K mileage a year ago when I decided to buy it for an incredible low price. In 2 years he put 90K mileage on it. Very strange. Anyways, I have the car now for a year, and I put 10K mileage on it. The car has given no problems, and the Toyota dealership I bought it from told me all parts were in excellent condition. I asked them about the timing belt, and they told me that the 2010 Camry SE doesn't come with a timing belt. Like I said, everything about the car works. But because I know this car has driven a lot by the previous owner, I am a bit worried. Also, the car has never bet in an accident, and when I bought it, there were no chips on the exterior. The car looked brand new with 90K mileage on it.