Well, Joruus C'baoth was created around 27 BBY, aged to an adult human (aged to the real Jorus C'baoth's age) and still lived until several years after the battle of Endor.
He was a Spaarti clone.
He did not appear to be near his natural death when he was killed, nor did he seem to believe he would die any time soon.
It's therefore likely that Spaarti clones will age at a normal rate after their rapid-growth period.
I have no similar data for Kaminoan clones, however it is not difficult to believe that, if the Spaarti clones can age at a normal rate after maturation, the Kaminoans would be able to do the same with theirs, or possibly even slow their rate of aging.
There's also scattered references to surviving clone troopers being active Stormtroopers through the battle of Endor at least. The Empire wouldn't keep them as active troops if they couldn't do the job.
Therefore, it's logical to assume that clones have at LEAST the normal lifespan, starting from when they reach the desired age (and the rapid aging is ceased).