Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5225ee0ac732d55f4c76e64b1be2d4cd5f50f6707234ddba4fe69a09ca05b244' 
  AND token = 'KvOHVSojGDdIVXwK9QMNhVH3el8Jr1jcQTpxHXnF7YY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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