There is no such thing as 'too old to work'… whether you're 55 or 85, you can work as long as you want when you have the skills and experience.
You always want to be able to show your employer what you have been working on. Even if it's slow, you can still be productive.
You should send your application or resume between 10 AM and 3 PM. This gives you a better chance of your resume being seen and not getting lost in the shuffle.