Nope, no hatch, and no way to get out of the aircraft (and survive) while airborne. If you depressurize the aircraft and open any of the cabin doors you'll run into either the engines, wings, or the horiz stab. If you go out the nose, the gear will have to be down and you'll hit the center gear on the way out, or if that's retracted I'd guess you'd hit the ARO compartment fairing.
In any case, it really doesn't matter too much because we don't carry parachutes on the -10. For the reasons stated above.
I've heard the 135 escape chute is actually a quick ride. I didn't go through 135 training, so take my words about it with a grain of salt. But from what I hear from folks who were 135 qual'd, you'd emergency open the hatch and hold the rails while you jump down the tunnel. IIRC, only 1 person (the boomer) has ever jumped from a 135, and he survived without a scratch.