How can I make the keyframes play without blending?

I have three keyframes for the roll rotation in Unreal Engine, where keyframes 1 and 3 share the same value, while keyframe 2 has a different value. The first two keyframes can have blending, but I want keyframes 2 and 3 to be instant, without any distance between them. Despite placing the last two keyframes close together, there is still blending in the game. The animation preview shows the last two keyframes happening instantly, but in the game, there is unnecessary blending. I have tried playing the animation with play montage and play animation nodes. How can I make the keyframes play without blending?

If it were animation software, I could choose step for the keyframe, but when I right-click on the keyframe, this is all I see:

Keyframes:

image