SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '05d713f7356947a22a8961315ae947517201154332b51894bde202e94fa64838' 
  AND token = 'mmk+cjCMW9gqsXR1Z4WMJUXaMl1NykwIY79b2X+KAhk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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