As a self-certified porn expert, I can tell you that your quest to find this particular scene from your memory is unfortunately a much, much tougher challenge than I expect you realize.
From your recounting of what few details you remember, I'd estimate there to be thousands of scenes that might fit that description. Even if there was one singular website that had absolutely every porn scene ever filmed in a database, I doubt you'd be able to sift through all the potential results of a search that included every detail.
There's so much content out there you'll never find your scene without a better starting point.
You need to have a production company, or a niche series name, or ideally a performer's name to have any shot at finding your unicorn.

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