Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa04ea5cf0fea7a4437c89bdfee22e163203da8cbdb9b3867a930048245bd3fb' 
  AND token = 'dDZfadkNDIUahTVcVHULfD6QGuXRa8LFL8q6KP0SXNo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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