Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2dff0ada04933b213b7e2b078fec46293401ceb32cedcfdd747e452926ca0ea2' 
  AND token = 'g04ZrUhQw0Hu3vXV+u12atecW+iVlH9Eyx6holMR4vE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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