What is the oldest a male corn snake can be and still successfully breed? I know this has been asked for BPs, but what about corns?

I ask because it seems I'll have a few years to wait before my two little girls are old/big enough to breed, and my two males are already of proper age and weight. My Ghost is 2 years old and 530g, and my Amel is 1 year old and over 300g. Will they still be going strong when my girls are ready?