Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '5992d03b19fb6e70dc4ce086bda0b2fb6eec7b2bf09dfc55c43d50c667ad487b' 
  AND token = 'bcStJbmScX/CtjctvVbN8a/RJZld5xBLYT49v9G/qbU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

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