love.keyboard.isScancodeDown
Checks whether the specified Scancodes are pressed. Not to be confused with love.keypressed or love.keyreleased.

Unlike regular KeyConstants, Scancodes are keyboard layout-independent. The scancode 'w' is used if the key in the same place as the 'w' key on an American keyboard is pressed, no matter what the key is labelled or what the user's operating system settings are.
down = love.keyboard.isScancodeDown( scancode, ... )
scancode Scancode A Scancode to check.
... Scancode Additional Scancodes to check.
down boolean True if any supplied Scancode is down, false if not.