Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0392a4341675ad80222cd07b0f45f1d6cadbd478892fa707ff21637a03269928' 
  AND token = 'ptMtuFdmxvbl1AjRtNYdokz7Tpf/SffNbPaNMzJ4h2E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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