SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0128082395bcfd7a07800326c6d11bbf17e381f9079fae85432aeabb31986b87' 
  AND token = '8JgIFA9sGuh6Ny3tTw6HCIfYxiKnMyXgwjeGB9M+nLQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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