Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '692bdde7c4ebd1c50799e7efe989a0a320921267b240fca4cf663b32b6bdfda3' 
  AND token = 'RUutCRsPVDZlmQEIEjiWPfdppvEBQo7XgJVGTRxH1yI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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