Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a67771e0775435aefecff4cf46898f995056499911c9c1adc33283bc9db8a7c2' 
  AND token = 'nlhdCwkTIG9f1/VTeHbnM09B64eHRvlt9kUayVR+vsE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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