Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '64e6b71fff5f77c9d1fdfc5db5d92973358c86013629ceb9f711c75508616c89' 
  AND token = 'xydZao8rKwzPEOr6+q4Do3TOw/w1ON7FtjMhXkKzNjU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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