Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '86c736f8f6bac61e727508afdf850ac524845b438adf01be4fe853f293783a1b' 
  AND token = 'hzqICj5KzLcDeTyXqiRNIuoKQ/zQwT042cOfggQ7X38=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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