Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f0ee32ad4b76d88cdc2a8c64fdd649a165e854738e785168f45db42a8a08779d' 
  AND token = 'EUZ0nJeiJ7RkrsAlmTRxWNciGLBsKQ7w4dMpRcfspWw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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