Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6b352d5e5ce736f9f133b571e34830c352eb502e0ff794a47132cf14568b1d1d' 
  AND token = 'aQDe4KJPrezjtR+cQ+qZptTb/r8lcZq6H4IqY6H3O98=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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