Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0bc1571730fd01691b3db734e6e74b004ffba9b56880b90511eaf1ea81e6f46' 
  AND token = 'DzWnq9DYWDm/ihboTbyj9yxOYKcZINyb2s69Ua/7/4o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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