Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f911b313e622bf15d309eb8f7ef6bb3090f088a6c4086ad97c0c011a573a9f28' 
  AND token = '2Kt81DBlfh7O2h5wQskWoDnTzuUXVyoa5l7j7mFg3hc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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