Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4a601e5cc1cbe3bc8bb7b4e75b8aae66edfbe7c27b38cba6db58c5f32070c42f' 
  AND token = 'ldty+edqr24aVCxpFReCT/6KYKEAsedRxRSmCcdRvV4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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