Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '15c0413a6baf0eb630a5a68d43c1a04d93d0f77cebcf4f8b783607481c02e3a6' 
  AND token = 'YhkHL4yf7iVdDKUO4h7GP4L8wcPUA3uiik7SO0iACrs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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