Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6e94ec35902971efe8762c15aaa1dbcc152cdd0e8204827c3506921596271074' 
  AND token = 'p9Mam45lGIwy2+MA9/HATWjOndBMv/QSS5ES54a431M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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