Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '633f8a680493b46c30cebcb0ea351bf2e29a7999e68c792e6bd642efd16dd4e7' 
  AND token = 'ClgKK8s0Wu+qt68TuOxg70jP7Pnl9btWWFJmY2cxKTY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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