Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd9c0518c2341f10cba4a809d1da8146290bf881a932e23dea7f061cf88b6d0ed' 
  AND token = 'KHQx5yCpHwgyjimZsXpmu5F5yQo9lh7EjuuWrPrIpgs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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