My 2005 Hyundai Santa Fe timing belt broke

It really doesn’t matter how fast you’re driving when a timing chain or timing belt breaks. If the engine is an interference design, then this failure has possibly turned the rest of the engine to junk. That’s because the valves and pistons have tried to occupy the same space at the same time, and widespread internal damage is the usually outcome.

From what I can gather, the V6 engine in your car is indeed an interference design, so the damage is possibly terminal. You could remove the cylinder head(s) to check, but if the engine has locked up, there’s a fair chance you’ll need to either rebuild the engine or replace it with a different one. You may also find that the cost of these repairs will be greater than the market value of the vehicle itself. At that point, you need to decide whether to repair it or start again with a new vehicle.