Your brakes are designed to warn you by sqealing/chirping when the pads start wearing. I woudl guess you should get to 20-25 before needing to change unless you are really braking hard constantly.
Brake life is entirely based on how you drive. Most people with new Hondas get 40-60k on the first set of pads. Some drive exclusively around town for work, and they get less than 30k on the first set. It wouldn't hurt to have them inspected as part of a minor service at 15k, and have your tires rotated, but I would doubt they are almost worn out already. There is a wear indicator, a tab of soft metal, that starts touching the rotors when the inner pad gets near time to be replaced on most or all cars now, which makes an irritating squeal to let you know there is not much life left in the pads.
I think some cars have brake pad warning lights also. The control panel of the car will show a brake light indicator. That usually will warn you that the pads are low. Check you Car Manual.
Unless your last name in Andretti the front pads will last 50,000 miles or so and the rears about 100,000 miles or more. They are pretty easy to check, just take a wheel off.