Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '071a2b7d22e1c578eb8c0be09a43e6aba2328153359401063e42e910a9ead800' 
  AND token = 'SEbEgQmRTHuLzYtleBefz7QFqj3JyEeZ28dK61CBYkc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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