Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5641fc4ff5654a7b8cb47710a4dce4e3ce0bd9c8b12e884f8c139ac164ac222f' 
  AND token = '1q9UsPUcf91WfbOOkpn6Gcrl3VFL/Oe49/La9eSjso0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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