Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f192cac161983c09929b4f529a425edeceaf8c3fb85be2f5812707ff4f590260' 
  AND token = 'eGE/NcbQhM7j0Ejjz8GmjkUhGUNUqtwYUQt2p/5qSvQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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