Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '35ea9638c99ef41268e86f180d022e4452a3d57737a50d9ed7fe18fc77a55c23' 
  AND token = 'frJrpPXaRWak4KTxUm28ePHSiv4VtccElDW+mL3Q9ns=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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