Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '202064c3795945e0e6876a090ccac0d16450e0f5f635e4d680e95f8c209c7853' 
  AND token = '5tgXZ7ATF2W3mOJFurd2sOQn13qD9mW0RaBGykG5S8E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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