Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4b344ae2f02cd06af4b547c9ad478d6ca5bb1577855d536e547a2f423163fd96' 
  AND token = 'JlbZMS/ESAeQ3UlsJMOmt+fs6QhQmKuKi7qqW1edK40=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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