Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '77d347c1f4b786efd958978ae8d5b6f0628a57fba1e0aaac3546762dc6391e87' 
  AND token = 'OkkcU2rVpmPAAr9tDx1sRACaUxGkME2vy0rzM7Ov0Jw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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