Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3844cf10959d19cf6a29e5458a8d7004baf7a345c50aaa0cbc19fae5e00ccb3c' 
  AND token = 'UxvLi+cx5cw73/X7yaO9TRHbV60dkMlhfbfWJ+XWfAM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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