Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dc8e02c3fa80af3b7c245ed8a1a031cf200aed9857a7df139e6b3664dd19204f' 
  AND token = 'SfjB94CxIB5FE5nRt1ozU9x/Ld5UiT4yoE9O23aseXA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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