Depends on conditions and what specific dive site you are headed to. Xaman-ha is the faster boat, and can do under 50 minutes to Santa Rosa wall if I remember correctly. Over 60 if conditions are “sporty” - and the ride can be very bumpy.
The other boat is slower and bigger. It’s more stable though, so the ride is a bit comfier. Both are definitely wet
On a good day, you get two 60 minute dives and you are back in Playa by 3 pm.
Whichever shop you book through, better to ask a few days in advance, especially in high season. Someone mentioned Cenotexperience above - great guys.