Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '12d80cda65b25e97c7f36ff5fc28a87a8bfc7e1704db5b9fa11a9726759f8140' 
  AND token = 'ARfyFYHOL6nzvyvf3DQRA3M3zkJ+5tTaUp5kR3NuQ4I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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