Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f88a207f8f3a32d22140d251acc433b3572c5876d3025b205bacea82ae91a81' 
  AND token = 'BDYRw0zB7at3FxwzLzDX0LQR3Ag47PN8PPFUslolAiw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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