Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '31b4e4aeb318809f131856e332a6e39f23306ceaeca94a145f913d380ef72f47' 
  AND token = 'qAjy7ATSSpNA7FrZvDpCdAmB9QrZOsGtD699r0c6FPA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00085

JSON explain

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