Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7c65510a61d685f8af90925cad8df6c03955d77adfb8a858b7fccd667b700798' 
  AND token = 'jlnIazEVyEry2O/TcKwjHwdWXeB2UdkXdWquUmsQrU0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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