Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ab0c8977250b5a34f36e488a8b2e8bc4bb467f5e3a53ae77701aa7c8ce0c164' 
  AND token = '6lY0Ysyja0k/XhPy8j7ZByM6DgrdQVYgdGhhyh0ytRc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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