SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '60d452cdda584639f7f9cf34781d707759e69498508b84f1be487489d64218bd' 
  AND token = 'gkM0wFxim9oRBIPHw100xU0qKPvCZBTOaNwGVBuBPCk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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