Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9820d79a3ff05e6ff269095de00b3c18840371e466a01e73000230d58d5dc796' 
  AND token = 'AXlcPhgWmScXN3k5DpqJ1TxDbkB7h1Mscydo+Webkmg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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