Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b583044fbed6df8c76dfd8482f33e7259af49b97c2ab56f0334a4d67a073adfc' 
  AND token = 'g6USK41gchRgpIOKUwZPfKMl4Q3BxMFgx+52GtL4OaI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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