Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '85c4676dc306bfb60b9a9c96ae2aa0e346986bbed75521fe0454ade814eeddec' 
  AND token = 'yp7Azv8SrwlwpEryagOTsj+RM0YuWWd2x4izOyxhe5c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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