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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '8a0fbb2b9ea9511c58380682982e3ec325b7148cca5a929e31decbd0a81ddccc' 
  AND token = 'dVf2fPEADrIcdzoS3UyFvCurZ3F0JYU3kK1V36cfsm8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}