Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8b8e628cf0be8ad1c08f62e6029e9e635471b865883c41928218ffc9152e4e08' 
  AND token = '34v3UcO2Bx74Bhz45tHSFtIT9qnpd4N7a4Ln2LdT9bk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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