Circular saw with a fine toothed blade. Cut it from the opposite side that you want to look best. Additionally you could use some wide masking tape and have the cut line down the middle of the tape, some people say it makes a neater cut but personally I’ve never noticed the difference.
Fine tooth handsaw then. Cut from the side you want to look best. Take long sweeping cuts applying just enough pressure, if you try to force it you’ll be more likely to damage the laminate and not keep the straight cut both sides.