Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '38fb55e75395e7987ec3de2e0741679cbf4b9e418ed49cddf06cd43e58c493c0' 
  AND token = '1UxJtjHATtVuYhjleqI9/YNElmHwD4mIk+yV23t/YBs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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