Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9bf343d16e6527f10f81c7c425f5d4f4ad9fe67855d2446461006c68b1b34ccf' 
  AND token = 'qR7PnXcOF15LOU8ECdiqJXBNg915cWtJra6gvroKJ1A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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