Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bbad56f84ad92b30e8be367d5ba4f35beec6d13dea050e31ea5a421f18b69b23' 
  AND token = 'Sbs5wgyIdOaMeUywaQbUsGxdZj4OAZwIrl6HNu/X+Sg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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