Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3b016069f6afaab814b3484f8e7f5dd66ecad4bbb7b7cd4a2885c80f3fba6077' 
  AND token = 'lOpgxuaLBC7UbYEnZ7NIQCtopgWD3Vt3ufWg71/vL/k=' 
  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"
    }
  }
}