How can I delete keyframes? I am trying to sync this intro with music. The problem is that there are two really fast keyframes that don't look good. I want to delete them but I can't figure out how.

This is an image of the keyframes from the dope sheet. I want to delete the selected ones.
To delete keyframes, select them, and press X.

Some keyframes may be locked (Icon of a lock on the side). I can't tell because the Nurbs or the Spiral are not expanded in the Dope Sheet Summary.