Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9ed9cab23992641c2222beb579a38b7f93937735b9e531030ef1b8ccb8f3fd81' 
  AND token = 'hP39khqygZW1rKVppb5CZMR54QZLMyn5Fa0YWOkkBt4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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