Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '43acee21e0cc3c27d356edf673a96446ce092614ef7cb413cc2ea112ff5b7800' 
  AND token = '/JT9jFbxHBeQnlqc8AvRU6E7xeTR1ynzuCS901kPTrc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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