Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ef81b02ad094547305666c005d02eee572cb1660ec0314742f21957b229184f2' 
  AND token = 'VhAiW9kLqiLk2wZd2GwhWZdMY05SC45buttzx+Xb3gs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00056

JSON explain

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