Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7de3337ed0bbad564b57dc3b2d068029cd3f671f60ad4242fe082e3b8b7df46e' 
  AND token = '8kEGX/jkT93YnfHD/rfjvCFCiAd8ZFmYGFt9tgZ+f0Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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