An American performer named Keith (yes, just Keith) released the single “98.6” in 1967. The song reached #7 on the Billboard chart and #24 on the UK Singles Chart in 1967. The Tokens, the Brooklyn-based doo-wop group better known for “The Lion Sleeps Tonight,” provided back-up vocals.
The tune features a few instrumental breaks featuring key-of-the-moment glimpses. But the actual modulation is at 2:47 as the instrumental outro begins.
modulationoftheday.home.blog 
The song title may be out of date: https://livingearth.substack.com/p/are-we-becoming-reptilians
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