This is not easy but the principle is to ask them questions about why the five years of experience made its way into the job search criteria.

Either there is a very good reason for this which will almost certainly be based on a fear which they think they can mitigate by putting the stipulation in place. Your job is to then ask questions about that fear and try to "close" on you as a total package being able to settle all those fears.

Alternatively they might just be asking about the 5 years because they thought tit was a good idea some time ago but it's lost its relevance today in which case you can steer around the objection.

You might find more help here - https://www.udemy.com/sales-skills-to-win-your-perfect-job/

Good luck.

Keep poking around the fears they have which are behind the job specification and prove that you can take them away. Ask them to question their own assumptions, perhaps using examples in their total experience, where the rookie outperformed the old hand.....use your own examples as a motivating metaphor.

In the final analysis, if they have good reasons then they protected you from failing in a job that was not right for you.