Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3eb57aa05916d61d53ca7f260d408c62171b6d02fd699edfb937207eb564860a' 
  AND token = '154U29thyTTIO7IYfwh2R/eYBd/fw2cc7w1Ib/G/SvE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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