Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd6373cbea4775a7fd70ab787c027f9adb046de0e9bef1cfc42ca2be7f6ea42c9' 
  AND token = 'q9+VKm/qXPH+lg3km+9RANxWZGRMnwB3le4cT9PvhnE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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