Sandbox

SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'c4f6d31edad891a99fe02f22d53e1fa5fc23f61985d4b83799ac5d8b8116de45' 
  AND token = 'nUvIRLakSjSNb0qqKSzOuNSQ/hkwaYG74QNoGO1qd7E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}