Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b889431aeac68e388a3dfd4aae3d071d2b3ec4a17fd67e566d73715f97e248db' 
  AND token = 'FkF6AYqoDxWK5+MoirFxAQfTuxEBR6qBdGsbJIpogc0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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