Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '29f5c77a13bfc2881f7c8416b50e0ac35ae4457a98776e154af150e36c687f8d' 
  AND token = 'n3Rnxza7XpgxizdFtYp1ruNDkXAwlr7VFwj0pTaIDaQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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