FIG. 1 is a front perspective view of the key for an electric lock showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and

FIG. 8 is a right side elevational view thereof, the broken-line depiction of a female electrical receptor being for illustrative purposes only and forming no part of the claimed design.