Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5f9ed362fe9725009b7b85c64e47208199b4a3c07625dd944d8d455c9bf4a3fc' 
  AND token = 'MK+GqPb+U63zvCO6wANfwVE4pW0LDkIQKC9P8nod6nc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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