I’ve always thought that if you’re constantly having to work long hours (the exception being if it’s your business, then it’s your choice and sometimes a necessity) then you are not efficient and don’t use your time as productively as possible.
In the past I’ve heard many people spend an hour a day, or more, complaining that they don’t have enough time to do their job!
A person working long hours more often than not demonstrates a lack of ability or of support, both are toxic in any organisation.
Go home, spend time with family or on yourself, because you’ll never be paid for those extra hours and your boss won’t appreciate it, she/he will just get used to it and soon expect it as your normal day.
Do yourself a favour and GO HOME!