Lock plate

FIG. 1 is a front perspective view of a lock plate showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a bottom view thereof.

The broken lines define the bounds of the claimed design and form no part thereof. The white unshaded areas within the broken lines form no part of the claimed design.