Throughout the interview, @Locrian, you need to be interviewing them to determine if that place / company / job / team is where you want to be. As you are doing so, and if as you go their responses validate that it is, then you need to enthusiastically react and communicate to them that that is the case, while it is happening during the interview.
As the interview goes along, for each and every reason that theirs is the good place / company / job / team for you, make a mental note of that reason. Or better yet write it down, briefly, e.g., jot down those reasons: “hours”, or “team chemistry”, or whatever those reasons are. All of them.
Towards the end of the interview, directly address that 500 pound gorilla in the room. Perhaps even ask them about it directly, if and only if you have determined during the interview that that is a good tact to pursue: “You know, I bring more skills / experience / qualifications than are required for this position. What if any concerns do you have about this?”
Take the bull by the horns. Directly and honestly.
Do this only after you have collected all the reasons that theirs is the good place / company / job / team for you.
With their answer, and with your reasons, as you close you need to make a pitch to them, you need to sell yourself to them that the fit of this position is perfect for you. And it is perfect for them. Use those notes, those reasons that you’ve jotted down — all of them.
You need to reassure them that you will be happy there. You need to reassure them that you will stay there, at that position, for much longer than what is considered traditional.
You do this by relating from your work history where and when you have already done this before: from my resumé please note that X years ago I worked at Company Y or Job Y, and while there because of Z I did this or I did that.
Come up with at least 2-3 of the best concrete examples from your work history where you have already done this.
You also do this by telling them why, for you, this position is perfect.
Optional: You can also solidify your case, solidify your being the best candidate for them, by writing down and giving to them personal references of people who will vouch for you regarding those specific work history examples or those reasons why this position is perfect for you. And hand that note to them, right there in the interview. It can be written down on a napkin, for all you care, or whatever piece of paper is available. Even if that note only says ‘Jim’ and ‘Company Y’, or ‘Company Y reference’ and tell them that you will send their contact info within X days.
And make sure that you do.
Another tact you can take is to ask them where they are in their selection process. Near the beginning? Towards the middle? Towards the end? And ask them how many good candidates do they have lined up? And where are you in that group? Or are you even in that group? If not, ask them why not?
At your interview, when you are done and leaving, you need to assure them that the fit of what they need is best met by you and what you bring to the table.
Another tact you can possibly take: tell them that if they offer you this job, that you will stay at least X years there with them. Actually use the words, while holding direct eye contact, “I give you my word that you will stay at least X years there with them.”
Follow-up: write a thank you email that summarizes and reminds them of these reasons. Do not send it that same day. Send it 1-2 days after your interview. Send it to every person that you interviewed with. Ideally do not send it to only one person, but to all. During your interview collect their emails and tell them that it is for a follow-up and thank you that you will send within 1-2 days.
Good luck. Kick some ass! Knock ‘em dead!