Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3810389bd1e4f58fa013527caa182302155e1af859471c8df1585d056fe10c6d' 
  AND token = '3jcqNqYu7qWAp8yO9vjRMjIuxKbZ1vi30+CLLIUNm2k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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