Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9aa1ad286d704c714c4a3d97a722e567b82a8b8eb4b3b4612bc82b98e20fd6bb' 
  AND token = '8OZRbU9PX0WN87j+WQytG2TEW4YgtNgxKnfz4qIB/OI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}