Switching 240VAC 1A max from 5VDC
I'm using one like this in a light stage box I built:

one 1 channel relay module 5V 12V 24V

I am not sure how many times it has opened/closed, but I'm sure it's more than 1,000 times, varying between weeks (when not in use/power switched off) until a few seconds or faster for testing.

My load is a 240V/36W (or slightly less) LED light, thus only 0.15 A, however according to the specs it can take 10A.

It has an optocoupler builtin, so the switching part is separated from the high voltage part.

The price is about 50 cents, so I would say such relay module is perfect for what you need (even if 10A is more than what you need). 

Note: there are different types for 3(.3) V, 5 V or 12 V.

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