Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1b5169eebb9941152dfca8c5248f488a5b7f3992ca9613ef6ce975ae9697a24f' 
  AND token = 'v460fDeL/2RkUG+4Rm7DtudFgkA2yNOE3iwlwGdHIaU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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