Does Torque reduce at high RPM simply because the engine "explosions" aren't as efficient because they're too rushed?

So correct me if I'm wrong but torque from the engine is possible because of the ignition of the fuel pushing the piston and causing a turning motion. By increasing the rate at which the engine cycle occurs, a more violent "explosion" occurs therefore higher torque available. It increases until torque reaches a peak before starting to decline, because from what I understand the "explosions" aren't as efficient?

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Note: I'm prolly mislabeling some terms sorry for the that, not really from mechanical, came from electrical.