Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa00f91fc364bd15e8fa4f457ec65637a53ae6c827ab780595b8a2c1cfb1ff4f' 
  AND token = 'PXuq0zz1saDooS7eKXpb1cGVnv1VaLx1mpQDq6OBlvU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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