Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '467f818812e020e24636c50ca20dd67ca86dd66707c39a502d2bc87a60bc0cad' 
  AND token = 'G4kG6qvVjVLQjjg8/cIeoAEJ3UNuxqRJHa6+D1D4KsU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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