Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'af30be6c4f460a779e7bea9b25c3811be1584473d08721edc194ce1584d46f27' 
  AND token = 'sS05SDND4AOoBuE/AFndXvfWk6wP+6KOBP5/EVboC90=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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