What DAY are you flying and when? The conventional wisdom is three hours. You do need to allow that much time, just in case, if it's a Saturday in high season. TSA pre-check means absolutely nothing in SXM, as there is no such thing.

As far as food, there are not a lot of places, but there is a pretty good burger place, Johney Burger, as well as a sandwich shop with gourmet type goodies, Le Bistro by Bacchus. No real sit down restaurants inside security. Many people stop somewhere close to the airport and get a sandwich to go and take it with them on the plane, such as from Zee Best.