Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ad69ef56ee0b4e7f1d7f51265577082ea267dba3c9801843003e887e2ba544dc' 
  AND token = 'Q4QJ4LwmFEYw0eJIxHP5Xj/jiI6TYHwhsApJooGVt4Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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