Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ad69cbf83c14ae7af2955ec9f1b46056764ae4a079fe80661cb56c3f0a9dd8d4' 
  AND token = 'Cu/ShE8I7gDbH8aCTIw28RQiF5vpTPrsOJ32sHwNv9Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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