Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a9e6ac3e0317df65a5a5ea8528015db3d10e3a277d6ea65b8e4c2a7c80d8df24' 
  AND token = 'iqtH70G5nb4Df3xvIDnNVqeB3bAL8zXQJdfETEse33s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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