Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'fcf461efaa3c6e960ce8849c43948f6eb335e8934249e22e2e012f98312556fc' 
  AND token = 'PGx6D0S8stxQE4UMORh60H1m3DxxndfxdLe9Fs3PkwY=' 
  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"
    }
  }
}