Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '67c41f224eaa98cf9e5402932a9082123859ff285e6cd3c1146bcc8cf82eba5a' 
  AND token = 'sVqTxY2317yWIMnN5ckhBIk+f5squD3FwH5PXBL93aU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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