Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f1015ad3c315e87dd93dc1966c44f3962a0fbac8a52a44c437a67c5f49c435fa' 
  AND token = 'ewycqTbodiyIfw387c4HvCj7ZC7BU3eJkuHuNn4Z3xE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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