Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '98f1e8ccd50bf9ff5c7e9772a98e91ddea1a9b063f7a1f2fe27a32390a697cda' 
  AND token = 'M17jKq6sUvzYBSceyn8YU4iqgY9thHOt7XcQGwmsA48=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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