Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3c5674184088ee81e4cc04a563226ec780ac2438a55b90efe8407d29ed159848' 
  AND token = 'bInvAYlN96y86w01GKOaPHQUHy8ZixTV+Ccjkd9nMYI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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