Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5940a23fa1e89689bfb6ba4f66f5544377eb394f67893542a9c98be936899d34' 
  AND token = 'ndA9CyvVmfyunptaBJYNBrr8CHaS+fzHivbpwuuetxU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}