Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ffb00439cf60cd25aa444992df35c35b568754885dbe121680924ef443f05090' 
  AND token = 'rmQUX7P0bHgnxirYeiUb/87SYIjLYFf9tJK1fWA3AGc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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