its confusing at the original service shedule will probably show it as a 120,000 miles change. Or 6 years whichever comes first.
However its widely adopted that its 60,000 miles or 5 years. some are even saying 4 years now.
While to consequences of a belt failing are potentially very expensive, i think its also fair to say we have not been inundated with threads relating to failed timing belts.
In your case, regardless of the mileage, if the belt has never been changed i suggest it needs it on age alone.