Well, I guess he dies with a smile on his face.
Google AI:
The ejaculation is so powerful that it ruptures the endophallus, disconnecting the drone from the queen. The bulb of the endophallus is broken off inside of the queen during mating—so drones mate only once, and die shortly after.
https://en.wikipedia.org/wiki/Drone_(bee)
Drone (bee) - Wikipedia