SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07fa3094a593b7bb79fcacd0ee5e78ffe31ae879a2a643adf2e6d199b5d4c27d' 
  AND token = 'CvgqxxlrVFZbCVfK6BgXZDGwWg/7iFSV8Xwx7SrtYgs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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